CVE-2026-3593
CRITICAL9.8EPSS 0.04%Published: 5/20/2026Modified: 5/22/2026
Also known as:ALPINE-CVE-2026-3593
Description
A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.
Affected packages (2)
- Alpine/bindfrom 0, < 9.18.49-r0
- Debian/bind9from 0, < 1:9.20.23-1~deb13u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |